Pump plunger



Patented Jan. 9, 1923.

EUGENE claim, or nrrmrnen, rnlvivnssnn, assrenon T0 THELE. M. GANT 00., OF ETHRIDGE, TENNESSEE, A CORPORATION OF TENNESSEE.

PUMP "memes.

lp phlcation filed September 17, 1921. Serial No. 501,282. H

State of Tennessee,- have invented certain .new and useful Improvements 111 Pump Plungels, of which the following is a specification, reference being had to the accompanying drawings.

This invention'relates to certain improvements in pump plungers, and it is an object of the inventionto provide a device of this general character embodying a novel' and improved'structure whereby the sameis in swivelled connection with its coacting rod, re-

sulting in increased efliciency of'the plunger and prolonging the life of the cup associated therewith. I

Another object of the invention'isto provide a novel'and improved device of this general character having a port therethrough which is closed by the stem during a compression stroke of the plunger and which is opened upon movement of the plunger in the opposite direction.

The invention consists in the details of construction and in the combination and arrangement of the sever-a1 parts of my improved pump plunger whereby certain im-' portant advantages are attained and the de vice rendered simpler, less expensive and otherwise more convenient and advantageous for use, as will be hereinafter more fully set forth.

The novel features of my invention l-ierein-after be definitely claimed.

In order that my invention. may be thebetter understood, I will now proceed todescribe thesame with reference to the accompany ing drawings, wherein: I

Figure 1 is a fragmentary view partly in section and partly in elevation illustrating a plunger constructed in accordance with an embodiment of my invention and applied within a cylinder;

Figure 2 is a view similar to Figure 1 showing certain of the parts in a second po-. sition;

Figure 3 is a sectional view taken substantially on the line 3-3 of Figure 1; and

Figure 4 is a'view in perspective of the nut herein disclosed.

My improved plunger as herein disclosed comprises an annular band or sleeve 1 in which is adapted to be threaded a plug 2, the

outer end of said plug being provided 'with an outstanding annular flange 3 so that .a leather washer or cup. amayv have its inner marginal portion effectively"clamped beu c g 1 when the plunger is tween said flange 3 and the adjacent endof the member or sleeve assembled.

The inner face of the plug 2 is provided at its axial center with a socket or chamber 5 and disposedthrough thebottom of said socket or chamber 5 at the axial center thereof is a. nipple or vent tube 6 extending inwardly of the socket or chamber 5 and ter minating a desired distance above the bottom of-the chamber'5f The outer end portion of the nipple or vent tube 6is substantially flush'with the outer face of the plug 2.

S denotes an operating stem provided at;

its inserted end portion with an annular enlargement or head 7, said end portion of the stem S extending within the socket 'or chamher 5. Loosely surrounding the stem S in-. wardly' of the head or enlargement 7 is a nut 8 adapted to be threadedwithin the socket or chamber -5 whereby the stem 3' and plug 2 are inswivelled connection; The inserted end of the stems at its axial: center is provided with a recess or socket *9 inwhich is adapted to extend the adjacent end portion of the nipple or. tube 6 so that upon movement of the plug 2, together with the parts carried thereby, duringa compression stroke, the stem S closes the flow through thenipple or tube 6. v will To facilitate this closure, a gasket, or washer lO surrounds the-nipple or plug 6 at the bottom .of the chamber or socket 5 forcontact with the inserted end of the "stem S. The socket or chamber 5 is of a dept-hto permit the plug 2 and the parts carried therebv vrre. I

to have limited movement lengthwise of the stem S so that, upon retrograde movement of the stem S, the air within the pump cylinder will passthrough the nippleor -vent tube 6'to the compression side of the plunger.

To facilitate this passage of the air, the plunger immediately adjacent the enlargement or head 7 is reduced in thickness to provide the flattened faces a. said faces being of a length to extend-beyond the applied nut 8. hen the plug 2 is atthe limit of its movement to permit the opening of the nipple or tube 6, the enlargement or head 7 has substantially close contact with'the inserted end of the applied nut 8 and in order that yond the inner or compression side of the annular band or sleeve 1 so that theplunger head or piston may have movement to the extreme "compressionend of the associated cylinder and which in itself is of particular importance in practice From the foregoing description it is thought to be obvious that apump plunger constructed in accordance with my invention: is particularly "well adapted for use by reason of the convenience and facility with which it, may be assembled and operated, and it will also, be obvious that my invention-is susceptibleof some change and modification withoutdepartingfrom the principles and spirit thereof and forthis reason I do not wish'to be understood as limitmgmyself to the precise arrangement-and formation of the several parts here n shown in carry ingout my invention in practice except as hereinafter claimed.

I claim: 7 v p 1.- A pump plunger comprising, in combination, a member, a cup washer associated therewith, said member on its inner face being. provided wi th a socket,a;-nipple disposed through the member and terminating within the socket, said" nipple forming an air port through the member, a stem having an end portion extending within the socket, and coacting. means carried by the stem and member for holdingthe samein swivelled connection, said member having limited movementlengthwise of the stem said. stem, upon movement of the member in one directiou, closing thevfiow tin'ough the nipple.

:2. A pump plunger comprising, in combi nation, a member, a cup washer associated therewith, said member 011' its inner face being provided with a socket, a nipple disposed througl'i themember and terminating within the socket, said nipple forming an air port through, the member, astem having an end Portionextending within the socket, and coacting means carried by the stem and member for holding the-same in ing' .withinthe socket, said nippleformi ng, an air port through the member, a: stem hav ng an end portlon extending Wlth ll'l-itl'lesocket, said inserted end portion being. pro vided with an enlargement, a nut :-:.tn' ro1md=- ing the stem and engaged within the socket whereby the stem and member are held swlvelledconnection, the socket beurg of a' depth to permitthe member to have limited movement lengthwise of the stem, said stem, upon movement of the member in .onedirection lengthwise of the stem, closingthe flow through the nipple, said inserted'en'd portion-of the stem being reduced to provide a port leading from within the socket to one side of the member.

t. A pump plunger comprising,,.in com bination, a member, a cup washeriassociated therewith, said memberon its inner facebeing provided with asocket, a nipple. disposed through the member and terminating within'the socket, said nipple forming an air port through the member, a, stem hav mg an end portion extendmg w thin" the socket, said mserted end portion belng provided with an enlargement, anut surround ing the stem and engaged within the socket whereb the stem and member are held in swivellcd connection, the socket beingflof a: depth to permit themember to have limited movement lengthwiseof the stem, said stem,- u'pon' movement of the member in one direction lengtl'iwise of the stem, closingi the flow through'the'nipple,said inserted end portionof the stem beingreduced toprovide a port leading from within-the socket to one side of the member, the inserted edge of the nut having a recess to provide an air passage.

In testimony whereof I hereunto atfixomyu signature.

EUGENE M. GANT. 

